Add mISDN core files

[safe/jmp/linux-2.6] / drivers / isdn / mISDN / fsm.c

diff --git a/drivers/isdn/mISDN/fsm.c b/drivers/isdn/mISDN/fsm.c
new file mode 100644 (file)
index 0000000..b5d6553
--- /dev/null
+++ b/drivers/isdn/mISDN/fsm.c
@@ -0,0 +1,183 @@
+/*
+ * finite state machine implementation
+ *
+ * Author       Karsten Keil <kkeil@novell.com>
+ *
+ * Thanks to    Jan den Ouden
+ *              Fritz Elfert
+ * Copyright 2008  by Karsten Keil <kkeil@novell.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include "fsm.h"
+
+#define FSM_TIMER_DEBUG 0
+
+void
+mISDN_FsmNew(struct Fsm *fsm,
+       struct FsmNode *fnlist, int fncount)
+{
+       int i;
+
+       fsm->jumpmatrix = kzalloc(sizeof(FSMFNPTR) * fsm->state_count *
+               fsm->event_count, GFP_KERNEL);
+
+       for (i = 0; i < fncount; i++)
+               if ((fnlist[i].state >= fsm->state_count) ||
+                   (fnlist[i].event >= fsm->event_count)) {
+                       printk(KERN_ERR
+                           "mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
+                           i, (long)fnlist[i].state, (long)fsm->state_count,
+                           (long)fnlist[i].event, (long)fsm->event_count);
+               } else
+                       fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
+                           fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
+}
+EXPORT_SYMBOL(mISDN_FsmNew);
+
+void
+mISDN_FsmFree(struct Fsm *fsm)
+{
+       kfree((void *) fsm->jumpmatrix);
+}
+EXPORT_SYMBOL(mISDN_FsmFree);
+
+int
+mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
+{
+       FSMFNPTR r;
+
+       if ((fi->state >= fi->fsm->state_count) ||
+           (event >= fi->fsm->event_count)) {
+               printk(KERN_ERR
+                   "mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
+                   (long)fi->state, (long)fi->fsm->state_count, event,
+                   (long)fi->fsm->event_count);
+               return 1;
+       }
+       r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
+       if (r) {
+               if (fi->debug)
+                       fi->printdebug(fi, "State %s Event %s",
+                               fi->fsm->strState[fi->state],
+                               fi->fsm->strEvent[event]);
+               r(fi, event, arg);
+               return 0;
+       } else {
+               if (fi->debug)
+                       fi->printdebug(fi, "State %s Event %s no action",
+                               fi->fsm->strState[fi->state],
+                               fi->fsm->strEvent[event]);
+               return 1;
+       }
+}
+EXPORT_SYMBOL(mISDN_FsmEvent);
+
+void
+mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
+{
+       fi->state = newstate;
+       if (fi->debug)
+               fi->printdebug(fi, "ChangeState %s",
+                       fi->fsm->strState[newstate]);
+}
+EXPORT_SYMBOL(mISDN_FsmChangeState);
+
+static void
+FsmExpireTimer(struct FsmTimer *ft)
+{
+#if FSM_TIMER_DEBUG
+       if (ft->fi->debug)
+               ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
+#endif
+       mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
+}
+
+void
+mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
+{
+       ft->fi = fi;
+       ft->tl.function = (void *) FsmExpireTimer;
+       ft->tl.data = (long) ft;
+#if FSM_TIMER_DEBUG
+       if (ft->fi->debug)
+               ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
+#endif
+       init_timer(&ft->tl);
+}
+EXPORT_SYMBOL(mISDN_FsmInitTimer);
+
+void
+mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
+{
+#if FSM_TIMER_DEBUG
+       if (ft->fi->debug)
+               ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
+                       (long) ft, where);
+#endif
+       del_timer(&ft->tl);
+}
+EXPORT_SYMBOL(mISDN_FsmDelTimer);
+
+int
+mISDN_FsmAddTimer(struct FsmTimer *ft,
+           int millisec, int event, void *arg, int where)
+{
+
+#if FSM_TIMER_DEBUG
+       if (ft->fi->debug)
+               ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
+                       (long) ft, millisec, where);
+#endif
+
+       if (timer_pending(&ft->tl)) {
+               if (ft->fi->debug) {
+                       printk(KERN_WARNING
+                               "mISDN_FsmAddTimer: timer already active!\n");
+                       ft->fi->printdebug(ft->fi,
+                               "mISDN_FsmAddTimer already active!");
+               }
+               return -1;
+       }
+       init_timer(&ft->tl);
+       ft->event = event;
+       ft->arg = arg;
+       ft->tl.expires = jiffies + (millisec * HZ) / 1000;
+       add_timer(&ft->tl);
+       return 0;
+}
+EXPORT_SYMBOL(mISDN_FsmAddTimer);
+
+void
+mISDN_FsmRestartTimer(struct FsmTimer *ft,
+           int millisec, int event, void *arg, int where)
+{
+
+#if FSM_TIMER_DEBUG
+       if (ft->fi->debug)
+               ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
+                       (long) ft, millisec, where);
+#endif
+
+       if (timer_pending(&ft->tl))
+               del_timer(&ft->tl);
+       init_timer(&ft->tl);
+       ft->event = event;
+       ft->arg = arg;
+       ft->tl.expires = jiffies + (millisec * HZ) / 1000;
+       add_timer(&ft->tl);
+}
+EXPORT_SYMBOL(mISDN_FsmRestartTimer);